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-rw-r--r--src/preproc/tbl/tbl.man4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/preproc/tbl/tbl.man b/src/preproc/tbl/tbl.man
index cd4b6e70..f50e783c 100644
--- a/src/preproc/tbl/tbl.man
+++ b/src/preproc/tbl/tbl.man
@@ -360,11 +360,15 @@ Not allowed for the first row.
.TP
.BR _ , -
Replace this entry with a horizontal line.
+Note that `_' and `-' can be used for table fields only,
+not for column separator lines.
.
.TP
.B =
.
Replace this entry with a double horizontal line.
+Note that `=' can be used for table fields only,
+not for column separator lines.
.
.TP
.B |